#!/usr/bin/env bash
set -eu

PLAYLIST_ID="2BoXyJeV0fhEHOy4uiByxr"

BEARER_TOKEN_RES=$(
  curl -L https://open.spotify.com/playlist/"$PLAYLIST_ID" \
    | grep 'id="session"' \
    | sed 's&.*<script id="session"[^>]*>&&' \
    | sed 's/<.*//'
)
BEARER_TOKEN=$(echo "$BEARER_TOKEN_RES" | jq -r .accessToken)

GUEST_TOKEN_RES=$(
  curl -X POST https://clienttoken.spotify.com/v1/clienttoken \
    -H "Accept: application/json" -H "content-type: application/json" \
    --data '{"client_data":{"client_version":"1.2.27.147.g503c721c","client_id":"d8a5ed958d274c2e8ee717e6a4b0971d","js_sdk_data":{"device_brand":"unknown","device_model":"unknown","os":"linux","os_version":"unknown","device_id":"nuhuh","device_type":"computer"}}}'
)

if ! [[ "$(echo "$GUEST_TOKEN_RES" | jq -r .response_type)" == "RESPONSE_GRANTED_TOKEN_RESPONSE" ]]; then
  printf "\x1b[1;31m%s\x1b[0m\n" 'Token response is NOT granted' >&2
  exit 1;
fi

TOKEN=$(echo "$GUEST_TOKEN_RES" | jq -r .granted_token.token)
echo "got bearer token $BEARER_TOKEN" >&2
echo "got token $TOKEN" >&2

curl --request GET \
  --url https://api.spotify.com/v1/playlists/"$PLAYLIST_ID"/tracks \
  --header 'Authorization: Bearer '"$BEARER_TOKEN" \
  --header 'client-token: '"$TOKEN" | jq > playlist.json